Gemming for ExpertiseFollow

Simple and easily answered question right here, should we do it? After the last day or two of raiding I was able to find a hunter with less DKP then me so I could get Grim Toll in Naxx, pushing my HR to 372. This is gemmed for hit and AP (I know, I really need to change my gems out.) But my expertise isn't near the cap yet, only sitting at 15. So, since I can completely re-gem my gear away from hit with the new trinket, should I swap those out for straight AGI, or look into some expertise and try to cap it? Armory is linked below, and thanks in advance.


http://www.wowarmory.com/character-sheet.xml?r=Duskwood&n=Valtus

http://elitistjerks.com/f78/t37183-pocket_guide_wotlk/ is the thing you should look at first. The poison hit cap is 315, if my memory serves me well, and beyond that it's not worth gemming/enchanting for hit - you get a better return on straight agility.

This assumes that you've reached the expertise cap, which again if my memory serves, is 6.5%.